<?php

/**
 * @Author: xuebingsi  pdo
 * @Date:   2018-12-25 13:37:24
 * @Last Modified by:   zhibinm
 * @Last Modified time: 2018-12-25 13:41:43
 */
/**
 * 
 */
class Db 
{
	
	function __construct(argument)
	{
		# code...
	}
}